remove streaming db insert

internal/db/db.go

@@ -71,8 +71,7 @@ func (tdb *TelemDb) SetVersion(version int) error {
 }
 
 // sql expression to insert a bus event into the packets database.1
-const sqlInsertEvent = `
+const sqlInsertEvent =`INSERT INTO "bus_events" (ts, name, data) VALUES `
-INSERT INTO "bus_events" (ts, name, data) VALUES `
 
 // AddEvent adds the bus event to the database.
 func (tdb *TelemDb) AddEventsCtx(ctx context.Context, events ...skylab.BusEvent) (n int64, err error) {
@@ -125,63 +124,6 @@ func (tdb *TelemDb) AddEvents(events ...skylab.BusEvent) (int64, error) {
 	return tdb.AddEventsCtx(context.Background(), events...)
 }
 
-// Streaming logger.
-func (tdb *TelemDb) AddEventStreamCtx(ctx context.Context, events <-chan skylab.BusEvent, done chan<- bool) error {
-	const BatchSize = 500
-
-	tx, err := tdb.db.BeginTx(ctx, nil)
-	defer tx.Commit()
-	if err != nil {
-		return err
-	}
-
-	makePreparedStmt := func(ctx context.Context, tx *sql.Tx, n int) (*sql.Stmt, error) {
-		sqlStmt := sqlInsertEvent
-		const rowSql = "(?, ?, json(?))"
-		inserts := make([]string, n)
-		for i := 0; i < n; i++ {
-			inserts[n] = rowSql
-		}
-		sqlStmt = sqlStmt + strings.Join(inserts, ",")
-		return tx.PrepareContext(ctx, sqlStmt)
-	}
-
-	bulkStmt, err := makePreparedStmt(ctx, tx, BatchSize)
-
-	// this is the list of values that we use.
-	valBatch := make([]interface{}, 0, BatchSize*3)
-	batchIdx := 0
-	for {
-		e, more := <-events
-		if more {
-			j, err := json.Marshal(e.Data)
-			if err != nil {
-				continue // skip things that couldn't be marshalled
-			}
-			valBatch = append(valBatch, e.Timestamp.UnixMilli(), e.Data.String(), j)
-			batchIdx++
-			if batchIdx >= BatchSize {
-				_, err := bulkStmt.ExecContext(ctx, valBatch...)
-				if err != nil {
-					continue
-				}
-			}
-		} else {
-			break
-		}
-
-	}
-	// create a statement for the remaining items.
-	lastStmt, err := makePreparedStmt(ctx, tx, batchIdx)
-	if err != nil {
-		return nil
-	}
-	_, err = lastStmt.ExecContext(ctx, valBatch...)
-	done <- true
-
-	return nil
-}
-
 /// Query fragment guide:
 /// We need to be able to easily construct safe(!) and meaningful queries programatically
 /// so we make some new types that can be turned into SQL fragments that go inside the where clause.